QColormap Class
The QColormap class maps device independent QColors to device dependent pixel values. More...
| Header: | #include <QColormap> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS Widgets) target_link_libraries(mytarget PRIVATE Qt6::Widgets) |
| qmake: | QT += widgets |
- List of all members, including inherited members
- QColormap is part of Painting Classes.
Public Types
| enum | Mode { Direct, Indexed, Gray } |
Public Functions
| QColormap(const QColormap &colormap) | |
| ~QColormap() | |
| const QColor | colorAt(uint pixel) const |
| const QList<QColor> | colormap() const |
| int | depth() const |
| QColormap::Mode | mode() const |
| uint | pixel(const QColor &color) const |
| int | size() const |
| QColormap & | operator=(const QColormap &colormap) |
Static Public Members
| QColormap | instance(int screen = -1) |
Member Type Documentation
enum QColormap::Mode
This enum describes how QColormap maps device independent RGB values to device dependent pixel values.
| Constant | Value | Description |
|---|---|---|
QColormap::Direct | 0 | Pixel values are derived directly from the RGB values, also known as "True Color." |
QColormap::Indexed | 1 | Pixel values represent indexes into a list of available colors, i.e. QColormap uses the index of the color that most closely matches an RGB value. |
QColormap::Gray | 2 | Similar to Indexed, pixel values represent a list of available gray tones. QColormap uses the index of the gray tone that most closely matches the computed gray tone of an RGB value. |
Member Function Documentation
QColormap::QColormap(const QColormap &colormap)
Constructs a copy of another colormap.
[noexcept] QColormap::~QColormap()
Destroys the colormap.
const QColor QColormap::colorAt(uint pixel) const
Returns a QColor for the pixel.
See also pixel().
const QList<QColor> QColormap::colormap() const
Returns a list of colors which represents the devices colormap for Indexed and Gray modes. This function returns an empty list for Direct mode.
See also size().
int QColormap::depth() const
Returns the depth of the device.
See also size().
[static] QColormap QColormap::instance(int screen = -1)
Returns the colormap for the specified screen. If screen is -1, this function returns the colormap for the default screen.
QColormap::Mode QColormap::mode() const
Returns the mode of this colormap.
See also QColormap::Mode.
uint QColormap::pixel(const QColor &color) const
Returns a device dependent pixel value for the color.
See also colorAt().
int QColormap::size() const
Returns the size of the colormap for Indexed and Gray modes; Returns -1 for Direct mode.
See also colormap().
QColormap &QColormap::operator=(const QColormap &colormap)
Assigns the given colormap to this color map and returns a reference to this color map.
© 2024 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.
